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I want to make an archive_index page for my django site. However, the date-based generic views really aren't any help. I want the dictionary returned by the view to have all the years and months for which at least one instance of the object type exists. So if my blog started in September 2007, but there were no posts in April 2008, I could get something like this
2009 - Jan, Feb, Mar 2008 - Jan, Feb, Mar, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec 2007 - Sep, Oct, Nov, Dec
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distinct() Returns a new QuerySet that uses SELECT DISTINCT in its SQL query. This eliminates duplicate rows from the query results. By default, a QuerySet will not eliminate duplicate rows.
A QuerySet is a collection of data from a database. A QuerySet is built up as a list of objects. QuerySets makes it easier to get the data you actually need, by allowing you to filter and order the data.
The filter() method is used to filter you search, and allows you to return only the rows that matches the search term.
The exclude() method from the QuerySet class returns all objects that do not match the given keyword arguments. So whatever data matches the parameter that is passed into the exclude() method will be excluded from the returned QuerySet.
This will give you a list of unique posting dates:
Posts.objects.filter(draft=False).dates('post_date','month',order='DESC')
Of course you might not need the draft filter, and change 'post_date' to your field name, etc.
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I found the answer to my own question.
It's on this page in the documentation.
There's a function called dates that will give you distinct dates. So I can do
Entry.objects.dates('pub_date','month') to get a list of datetime objects, one for each year/month.
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